49197557 has 2 divisors, whose sum is σ = 49197558. Its totient is φ = 49197556.

The previous prime is 49197539. The next prime is 49197559. The reversal of 49197557 is 75579194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45778756 + 3418801 = 6766^2 + 1849^2 .

It is a cyclic number.

It is not a de Polignac number, because 49197557 - 2⁶ = 49197493 is a prime.

It is a super-2 number, since 2×49197557² = 4840799229536498, which contains 22 as substring.

Together with 49197559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49197559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24598778 + 24598779.

It is an arithmetic number, because the mean of its divisors is an integer number (24598779).

Almost surely, 2^49197557 is an apocalyptic number.

It is an amenable number.

49197557 is a deficient number, since it is larger than the sum of its proper divisors (1).

49197557 is an equidigital number, since it uses as much as digits as its factorization.

49197557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 47.

The square root of 49197557 is about 7014.0970195742. The cubic root of 49197557 is about 366.4216948636.

The spelling of 49197557 in words is "forty-nine million, one hundred ninety-seven thousand, five hundred fifty-seven".